The eSafe 320 Series Coupler is an easy to use, heavy duty, long lasting coupler, it is a one hand operated safety coupler that relieves pressure before disconnecting, eliminating the risk of hose kickback. The male threads on the coupler and nipple are provided with a thread seal at the factory, the couplings have smaller external dimensions than comparable designs, the fully automatic process simplifies operation, the eSafe design complies with ISO standard 4414 and EN 983